Magneto fly-wheel



Oct. 31, 1933. J. MIKULASEK 1,932,797

MAGNETO FLY-WHEEL original `Filed sept. 27, 1929 3 sheets-sheet 1 mno/SS' bww/gmac,

Och 31, 1933 J. MlKuLAsl-:K 1,932,797

l MAGNETO FLY-WHEEL original Filed sept'. 27. 1929 s sheets-sheet :5

@atented ct. 3l, 1933 UNITED STATES PATENT ori-ICE MAGNET() FLY-WHEEL John Mikulasek, Newton, Iowa, assigner to The Maytag Company, Newton, Iowa, .a corporation of Delaware Original application September 27, 1929, Serial No. 395,518. Divided and this application July 6, 1931. Serial No. 548,815

1s claims. (ci. 12s-149i' Among the objects of the invention is to provide a novel means and method of ignition in which is employed a magneto provided with a positive timing mechanism adapted to generate a spark in but one direction of rotation of the fly-wheel. The invention comprehends a system of ignition in which the same is governor controlled and the operating parts are reduced to a minimum, thus providing a simple and efficient construction.

Another object of the invention is to provide a y-wheel-magneto in which the fly-Wheel assembly is provided with means for circulating air for cooling the engine, the latter being provided with heat radiating ribs or ns which in` combination with the fly-wheel, dissipate the heat from the cylinder wall and other portions of the engine.

Still another object of the invention is to provide a novel construction of magneto-assembly and housing member, the housing member providing a mounting for various moving parts of the assembly and permitting ready access to the interior for adjustment of the assembly and the various parts thereof.

Another object is the provision of a novel armature plate construction and assembly, and means and method of mounting the same on the engine whereby the magneto is properly timed and held in time relation with the engine.

A still further object of the invention is the provision of novel means for adjusting the ignition system. The present construction comprehends the employment of a governor operating on the breaker points whereby to open the same at predetermined intervals, and to fail to open the points when the speed of the engine becomes excessive or increases above normal, whereby no current is induced for igniting the combustible charge in the cylinder. When the speed of the engine recedes to normal, the governor again acts upon the breaker assembly and the latter induces a charge in the high tension coil for igniting the charge.

Another object is the provision of an ignition assembly whereby the relation between the poles of the magnet and those on the core, and between the breaker assembly and the governor, is xed by timing means on the engine, whereby the same may be assembled and repaired by one having little or no experience in ignition systems.

Further objects are to provide a construction of maximum simplicity, efficiency, economy and ease of assembly, operation, repair and mainte- 00 nance; and such further objects, advantages and capabilities as will later more fully appear, and are inherently possessed thereby.

r The invention further resides in the combination, construction and arrangements of parts illustrated in the accompanyingv drawings, and while there is shown therein a preferred embodiment, it is to be understood that the same is susceptible of modication and change and comprehends other details, arrangements of parts, features and constructions, without departing from the spirit of the invention.

In the drawings: Fig. 1 is a view in side elevation of the ignition system and ny Wheel mounted upon an engine.

Fig. 2 is a View in horizontal cross section takenv through the :dy wheel and ignition system.

Fig. 3 is a fragmentary view in side elevation of the ignition system and ily wheel.

Figs. 4 and 5 are views in side elevation of the 80 fly wheel and armature plate assemblies.

Referring more particularly to thel disclosure in the drawings, the novel ignition system or magneto and :dy-wheel are shown as mounted upon a combustion engine of the type more particularly disclosed in my r:o-pending application Serial No. 395,518, referred to above. In this construction, the numeral 1 refers to the fuel and lubricant supply tank, which tank provides a mounting for the crank case 2, carburetor 3 and 90 foot starter 4 of the engine. This foot starter is adapted to rotate the crank shaft in but one direction, accomplished by treading on the foot lever.

This foot starter accelerates the engine by transmitting itsmovement to the crank shaft through positive engaging and disengaging mechanism.

The ignition system or magneto and the iiy- Wheel are constructed as a unit, the fly-Wheel 5 100 being mounted upon a cup-shaped housing 6 which forms with the armature plate 7, a complete enclosure for the ignition system.

The armature plate 7 is mounted upon the main bearing 8 for the crank shaft 9, the bearing 105 being connected to the crank case 2 by bolts or the like 10. The armature plate 7 is connected to or fastened on this main bearing member 8 by a, clamp 11, the plate being located by a stop shou1der 12 on the bearing, and is held stationary 110 6C",mounted upon lugs 32, cast or formed on the 31 on the housing 6.

in timed relation and position by means of a lug 13 on the plate adapted to be positioned between a pair of lugs 14 on the bearing, these lugs 14 forming therebetween an interlocking groove. The lug 13 is mounted on a projecting portion or enlargement 15 on the armature plate 7, this projecting portion or enlargement forming a recess within the plate for the reception of a high tension coil 16, the latter intensifying the current to a magnitude capable of developing a h ot spark in the spark plug 17 on the engine, the plug being connected to the coil by a cable 18.

The high tension magneto-fly-wheel which is provided for securing proper ignition of the combustible mixture in the cylinder of the engine, consists of two main assemblies; namely the armature plate assembly and the ily-wheel assembly. As set forth above, this armature plate carries the high tension coil 16, connected to a breaker assembly 19.

The interrupter or breaker assembly 19 and condenser 20 are also mounted on the armature plate with the breaker points 21 located on the upper side in order that any lubricant which may pass along the bearings and the bushings or bearing sleeves 22 will not lodge on the interrupter and collect on the breaker points, but rather in the lower portion of the breaker assembly.

In order to adjust the speed of rotation and the frequency with which the breaker points are opened, the invention comprehends the employment of a governor 23. This governor is provided With a long set screw 24 having a lock nut 25 whereby the screw may be adjusted so that the governor communicates to the breaker arm of the breaker assembly 19, a movement to provide the breaker points 21 with the desired gap when they are in open position. This long set screw is easily accessible after removal of the inspection plate 26 in the cup shaped housing 6 of the magneto, for manual adjustment. The governor 23 is further provided with an adjustable tension screw 28 having a lock nut 29, the screw 28 being connected to a spring 30 anchored upon a lug The arrangement of the governor and the breaker arm of the breaker assembly is such that they will cause the magneto to generate a hot spark in but one direction of rotation of the fly-wheel. Likewise, the engine will operate in but one direction. By the above construction, the governor is provided with two adjustments, one for speed by reason of the adjustable spring 30, and the other for positioning the cam on the governor so that it properly engages the interrupter and opens the breaker points when necessary. By removing the plate 26, both of these adjustments may be made manually, since the lock nuts 25 and 29 are immediately adjacent thereto.

The interrupter or breaker assembly 19 is armature plate 7 in order to bring the breaker cantilever 33 inthe path of the cam pin 34 mounted at 35 upon the short arm 36 of the governor, this arm having a lug 34a limiting the movement thereof. This breaker cantilever is pivotally mounted on a stud-pin 37 on the interrupter bracket 38, and is provided with a breaker point 21 at one end and is curved at the other to engage the cam pin at each revolution during normal operation of the engine. The cantilever is returned to normal inoperative position whereby the breaker points are in contact, by means of leaf springs 39, 40 and 41, the spring 39 being anchored on an end of the cantilever 33 and provided with a piece of bre 42 contacting thereagainst, and the springs 40 and 41 engaging the underside of the cantilever and mounted on an arm 43 of the bracket 38. Mounted upon the arm 43 and insulated therefrom is a plate 44 provided with an adjustable screw 45 having a breaker point 21 on its inner end. A lock nut 46 permits ready adjustment of this breaker point. From the plate 44 leads a connection or wire 47 to the coil 16, and a wire 48 to the condenser 20, the latter being connected to the armature plate 7 and ground through a lead or wire 49.

The high tension coil 16 is provided with an iron core 50, preferably laminated, which seats within laminated arm blocks 51 and 52. Mounted within the housing 6 of the ily-wheel by means such as bolts or the like, is an arcuate permanent magnet 53 provided with pole shoes 54 and 55 acting on the core 50 of the primary of the induction coil 16 through the blocks 51 and 52, whereby to induce v,therein the necessary charge for efiicient operation. In order to cool the engine, the iiywheel is provided with a plurality of vanes 56.

In the hub of the fly-wheel is pressed an oil slinger tubing 57 disposed about the outer bearing 22 to prevent the lubricant escaping from the bearing from entering the magneto.' Lubricant escaping to this tubing, is directed to a well or oil ring 58 from where it drains back into the fuel and lubricant supply tank l, or to be disposed of as desired. This slinger tubing 57 also provides a footing or base for the governor adjusting screw 24 and the lug 341 on the governor.

A coupling disc 59 mounted on the crank shaft 9 by means of a key 60, is connected to the side web 61 of the housing 6 by means of bolts 62 and 63, the latter providing a mounting for the governor 23, these bolts being unevenly spaced apart. This spacing provides a definite means for timing the magneto-fly-wheel with the engine. This timing means and the position of the lugs 13 and 14, provide a positive means for positioning and timing the various parts making up the assembly, whereby one having'had no previous experience, may assemble, dis-assemble and replace parts without danger of the parts having been improperly assembled. A lug 64 on the coupling disc balances the crank shaft on the fly-wheel side. A pulley 65 is mounted on the reduced portion or hub 66 of the coupling disc 59 by means of a set screw 67.

The fly-wheel and armature plate are preferably constructed of non-magnetic material to insure a permanent and eiiicient magnet for the ignition system.- In the original adjustment of the ignition system, the breaker points are rst set to full contact position by means of the screw 45 and lock nut 46. Adjustment for contact of the governor with the lever or breaker arm is made by the set screw 24 on the governor, while the adjustment for speed is made by the thumb screw 28 acting on the spring 30. Both of these latter two adjustments are readily made after removal ofthe inspection plate 26.

The angular relation between the poles of the arcuate magnet and the poles of the core, and also between the breaker assembly and governor, is positively xed by the denite timing means on the engine, whereby one with little or no experience may readily repair or replace parts, without danger to the system.

Having thus disclosed the invention,

I claim: i

1. In an internal combustion engine provided with a crank shaft and a fly-wheel, an armature plate mounted on said engine and retained thereon in proper timed relation, and a cup shaped plate on said fly-wheel and adapted to rotate therewith, said plates providing a housing, and a magneto-ignition system in said housing.

2. In an internal combustion engine provided with a crank shaft and a ily-wheel, an armature plate mounted on said engine and a cup shaped plate on said y-wheel and adapted to rotate therewith, said plates providing a housing, a magneto-ignition system in said housing, and including a breaker assembly, and a governor for operating said breaker assembly.

3. In an internal combustion engine provided with a crank shaft and a fly-Wheel, an armature plate mounted on said engine and a cup shaped p late on said ily-wheel and adapted to rotate therewith, said plates providing a housing, a magneto-ignition system in said housing, and iricluding a breaker assembly, a governor for operating Said breaker assembly, and an arcuate permanent magnet provided with a pair of pole shoes mounted within said iiy-wheel and rotatable therewith.

4. In an internal combustion engine provided with a crank shaft and a iiy-wheel, an armature plate mounted on said engine and a cup shaped plate on said :dy-wheel and adapted to rotate therewith, said plates providing a housing, a magneto-ignition system in said housing, and including a breaker assembly, a governor for operating said breaker assembly, and means for adjusting said governor. l

5. In an internal combustion engine provided with a crank shaft and a fly-wheel, an armature plate mounted on said engine and a cup shaped plate on said fly-wheel and adapted to rotate therewith, said plates providing a housing, a magneto-ignition system in said housing, and means for retaining said armature plate in proper timed relation.

6. In an internal combustion engine provided with a crank shaft and a :dy-wheel, an armature plate mounted on said engine and a cup shaped plate on said fly-wheel and adapted to rotate therewith, said plates providing a housing, a magneto-ignition system in said housing, a'bearing plate on said engine and provided with lugs, and a timing lug on said armature plate adapted to interlock with the lugs on said bearing plate for securing said armature plate in proper position.

7. An ignition system for combustion engines, comprising a housing including a stationary armature plate, a breaker assembly mounted on said plate, a plate adapted to beotated by the crank shaft of the engine and carrying a magnet, and a governor pivotally mounted on said rotatable plate adapted to engage said breaker assembly to separate the breaker points at a pre-,- determined period whereby to induce a current of suicient intensity for igniting the charge in the engine.

8. An ignition system for combustion engines, comprising a stationary armature plate, a breaker assembly mounted on said plate, and provided with a lever arm upon which is mounted one of the breaker points, an induction coil also mounted on said plate, means for retaining said plate in proper timed relation, a member adapted to be Arotated and provided with an arm for tripping the lever arm in the breaker assembly whereby to open the breaker` points at a predetermined period during each revolution of the member, and a permanent magnet mounted on said member for inducing a charge to the primary of the induction coil.

.9. In an ignition system, a stationary armature plate, a breaker assembly mounted on said plate and provided with a lever arm upon which is mounted one of the breakerpoints, an induction coil also mounted on said plate and provided with pole pieces, means for retaining said plate in proper timed relation, a member adapted to be rotated about said armature plate and provided with a permanent magnet and pole pieces adapted to induce a current into the pole pieces and primary of the ignition coil at predetermined intervals, and means on said member for opening said breaker points at predetermined intervals to interrupt and augment the primary circuit whereby to induce a current in the secondary or hightension circuit of the coil at such predetermined periods when the piston of the engine is at approximately the end of its compression stroke',

l0. In an ignition system, a stationary armature plate, a breaker assembly mounted on said plate and provided with a lever arm upon which is mounted one of the breaker points, an induction coil also mounted on said plate, means for retaining said plate in proper timed relation, a member adapted to be rotated about said arma;- ture plate, and means on said member for periodically interrupting the current flowing to the primary of the coil during normal operating speeds of the engine whereby to induce a current of great intensity in the secondary circuit for providing the engine with the necessary ignition spark, and for depriving the engine of such ignition spark when the speed of the engine increases to above normal.

11. In an ignition system for combustion engines, a stationary armature provided with a 'I breaker assembly, a member rotatable about said armature and carrying a magnet, and an arm pivotally mounted on said member for periodically engaging the breaker assembly to interrupt the current flow, and adjustable means on said arm for regulating the speed of the engine by depriving the engine of its ignition spark when operating at excessive speeds.

12. In an ignition system for combustion engines, a stationary armature provided with a breaker assembly, a member rotatable about said armature and carrying a magnet, and an arm pivotally mounted on said member for periodically engaging the breaker assembly to interrupt the current flow, and adjustable means for limiting the gap to which the breaker points of the breaker assembly are opened.

13. In an ignition system for combustion engines, a stationary armature provided with a breaker assembly, a member rotatable about said armature and carrying a magnet, and an arm pivotally mounted on said member for periodically engaging the breaker assembly to interrupt the current ow, means for regulating the speed of the engine by depriving the engine of its ignition spark when operating at excessive speeds, and means on said arm for limiting the gap to which the breaker points of the breaker assembly are opened.

14. In an ignition sys-tem for combustion engines, a stationary armature provided with an interrupter assemblyfamember rotatable about said armature and carrying a magnet, and a governor pivotally mounted on'said member, said assembly to trip the pivotally mounted part whereby to open the points at a predetermined period in the rotation of the member.

16. In an ignition system for combustion engines, a stationary armature provided with an interrupter assembly, said assembly being provided with a stationary and pivotally mounted part, each carrying a breaker point, a member rotatable about said armature and carrying a magnet, and a governor pivotally mounted on said member, said governor being provided with a lug projecting into the path of the breaker assembly to trip the pivotally mounted part whereby to open the points at a predetermined period in the rotation of the member, and means for regulating the gap to which the breaker points may be opened.

17. In an ignition system for combustion engines, a stationary armature provided with an interrupter assembly, a member rotatable about said armature and carrying a magnet, and a governor pivotally mounted on said member, said governor being provided with a lug projecting into the path of the breaker assembly to trip the same whereby to open the points at a predetermined period in the rotation of the member, and means for regulating the gap to which the breaker points may be opened, said governor withdrawing the lug from the path of the interrupter assembly when the speed of the engine increases above normal so as to deprive the engine of the necessary ignition spark whereby the speed of the engine is regulated.

18. In an ignition system for combustion engines, a stationary armature provided with an interrupter assembly, a member rotatable about said armature and carrying a magnet, and a governor pivotally mounted on said member, said governor being provided with a lug projecting into the path of the breaker assembly to trip the same whereby to open the points at a predetermined period in the rotation of the member, and means for regulating the gap to which the breaker points may be opened, said governor withdrawing the lug from the path of the interrupter assembly when the speed of the engine increases above normal so as to deprive the engine of the necessary ignition spark whereby the speed of the engine is regulated, and means for adjusting said governor whereby to regulate the maximum speed at which the engine may be operated.

JOHN MIKULASEK. 

